The invention relates to a method for processing a warp knitting young mink cashmere knitted polyester fabric, and belongs to the technical field of polyester fiber products. The method comprises the following steps: the selection and the beam-warping of raw materials, namely selecting a raw material of a surface layer tissue and a raw material of a bottom layer tissue, and warping the selected raw materials of the surface layer tissue and the selected raw material of the bottom layer tissue respectively; weaving, namely weaving the selected and warped raw materials of the surface layer tissue and the bottom layer tissue by a warp knitting machine through warp knitting to obtain greige cloth; dyeing, namely dyeing the greige cloth to obtain dyed greige cloth; and after finishing, namely performing after finishing on the dyed greige cloth to obtain the warp knitting ultra-soft grid knitted polyester fabric. The technical scheme abandons the traditional approach of the prior art which adopts pattern brushing to show grids in the fabric, makes substantial change to the weaving step, makes the fabric show regular stripes with different depth and width in the length direction through reasonable yarn-laid digit, shortens the process flow, saves labor and energy, reduces the probability of flaw, and avoids environmental pollution caused by traditional post-processing link after pattern brushing.